I don't think they bought shares,
it looks like they were awarded options at Friday's price that vest over the next 3 years. This is part of their annual compensation package.
"( 1) On January 14, 2011, Steven K. Sprague was granted 300,000 stock options under the Company's 1994 Employee Stock Option Plan. One-third of these stock options vest on each of the first three anniversaries of the date of the grant. "
"( 1) On January 14, 2011, Gerard T. Feeney was granted 225,000 stock options under the Company's 1994 Employee Stock Option Plan. One-third of these stock options vest on each of the first three anniversaries of the date of the grant. "
The above content is my opinion.